Passage
for they all did cast in of their superfluity; but she of her want did cast in all that she had, [even] all her living.
for they all did cast in of their superfluity; but she of her want did cast in all that she had, [even] all her living.
Mark 12:42 And there came a poor widow, and she cast in two mites, which make a farthing.
Mark 12:43 And he called unto him his disciples, and said unto them, Verily I say unto you, This poor widow cast in more than all they that are casting into the treasury:
Mark 12:44 for they all did cast in of their superfluity; but she of her want did cast in all that she had, [even] all her living.
The verse centers on "cast", "superfluity", "want", "even", and "living". It is saying that the verse draws attention to "cast" and "superfluity", so its meaning should be read from those terms before moving to application.
The prior verse says "And he called unto him his disciples...", giving immediate footing for "cast" and "superfluity". In Mark context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "cast" and "superfluity" with trust shaped by these words, not by a vague optimism outside the passage.